polygerrit-ui/app/elements/plugins/gr-theme-api/gr-theme-api.js

/**
 * @license
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
(function(window) {
  'use strict';

  // Prevent redefinition.
  if (window.GrThemeApi) { return; }

  function GrThemeApi(plugin) {
    this.plugin = plugin;
  }

  GrThemeApi.prototype.setHeaderLogoAndTitle = function(logoUrl, title) {
    this.plugin.hook('header-title', {replace: true}).onAttached(
        element => {
          const customHeader =
                document.createElement('gr-custom-plugin-header');
          customHeader.logoUrl = logoUrl;
          customHeader.title = title;
          element.appendChild(customHeader);
        });
  };

  window.GrThemeApi = GrThemeApi;
})(window);